Water Quality
Water Quality > Hudson River Estuary Data > Rockland County & Westchester County Sites > Annesville Creek

Annesville Creek

Annesville Creek
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Physical/Chemical Data

Physical, chemical and biological properties of the surface water that are measured continuously while the patrol boat is underway.

Entero Count (fecal indicator) and Rainfall

96 Samples taken

Sample Date [i] Enterococcus Count
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Entero Count

Enterococcus (“Entero”) is a fecal indicating bacterium that lives in the intestines of humans and other warm-blooded animals. It is the EPA preferred indicator for sewage contamination.

Quality Rain, day of (in) Prior Day 2 Days Prior 3 Days Prior Rain 4 Days Total Rain
Sort Sort Sort Sort Sort Sort Sort Sort
08/22/2023 109 Beach Advisory 0.0 0.0 0.0 0.0 0.0
07/18/2023 20 Acceptable 0.0 0.0 1.4 0.2 1.6
06/27/2023 2489 Beach Advisory 1.3 1.6 0.0 0.3 3.1
05/02/2023 216 Beach Advisory 0.0 0.2 2.2 1.6 4.0
10/11/2022 <10 Acceptable 0.0 0.0 0.0 0.0 0.0
09/11/2022 10 Acceptable 0.0 0.0 0.0 0.0 0.0
08/20/2022 <10 Acceptable 0.0 0.0 0.0 0.0 0.0
07/16/2022 <10 Acceptable 0.0 0.0 0.0 0.0 0.0
06/14/2022 <10 Acceptable 0.1 0.0 0.0 0.0 0.1
05/24/2022 75 Beach Advisory 0.0 0.0 0.0 0.0 0.0
10/29/2021 512 Beach Advisory 0.0 0.0 0.0 3.4 3.4
09/14/2021 <10 Acceptable 0.0 0.0 0.0 0.0 0.0
08/17/2021 20 Acceptable 0.0 0.0 0.0 0.1 0.1
07/20/2021 368 Beach Advisory 0.0 0.1 0.3 0.9 1.3
06/08/2021 <10 Acceptable 0.0 0.0 0.0 0.0 0.0
05/18/2021 63 Beach Advisory 0.0 0.0 0.0 0.0 0.0
10/15/2020 594 Beach Advisory 0.0 0.0 0.3 0.3 0.6
09/19/2020 246 Beach Advisory 0.0 0.0 0.0 0.0 0.0
08/15/2020 31 Acceptable 0.0 0.0 0.0 0.0 0.0
07/15/2020 10 Acceptable 0.0 0.0 0.0 0.0 0.0
06/17/2020 195 Beach Advisory 0.0 0.0 0.0 0.0 0.0
05/27/2020 <10 Acceptable 0.0 0.0 0.0 0.0 0.0
10/09/2019 74 Beach Advisory 0.1 0.1 0.2 0.0 0.4
09/11/2019 <10 Acceptable 0.0 0.0 0.0 0.0 0.0
08/07/2019 <10 Acceptable 0.0 0.0 0.0 0.2 0.2
07/10/2019 <10 Acceptable 0.0 0.0 0.0 0.0 0.0
06/06/2019 10 Acceptable 0.1 0.0 0.0 0.0 0.1
05/09/2019 20 Acceptable 0.0 0.0 0.0 0.1 0.1
10/11/2018 20 Acceptable 0.0 0.0 0.0 0.1 0.1
09/11/2018 41 Acceptable 0.0 1.7 0.1 0.1 1.9
08/15/2018 <10 Acceptable 0.0 0.0 0.8 0.2 1.0
07/18/2018 10 Acceptable 0.0 1.6 0.1 0.3 2.0
06/14/2018 <10 Acceptable 0.0 0.0 0.0 0.0 0.0
05/07/2018 31 Acceptable 0.0 0.2 0.0 0.0 0.2
10/17/2017 20 Acceptable 0.0 0.1 0.0 0.0 0.1
09/12/2017 <10 Acceptable 0.0 0.0 0.0 0.0 0.0
08/15/2017 20 Acceptable 0.1 0.0 0.0 0.4 0.5
07/11/2017 <10 Acceptable 0.4 0.1 0.0 0.0 0.5
06/13/2017 <10 Acceptable 0.0 0.0 0.0 0.0 0.0
05/16/2017 10 Acceptable 0.0 0.0 0.1 1.7 1.8
10/16/2016 <10 Acceptable 0.0 0.0 0.0 0.1 0.1
09/15/2016 134 Beach Advisory 0.0 0.2 0.0 0.0 0.2
08/16/2016 20 Acceptable 0.0 0.0 0.1 0.1 0.2
07/14/2016 20 Acceptable 0.2 0.0 0.0 0.0 0.2
06/16/2016 52 Acceptable 0.0 0.0 0.0 0.0 0.0
05/21/2016 10 Acceptable 0.0 0.0 0.0 0.0 0.0
10/13/2015 20 Acceptable 0.0 0.0 0.0 0.0 0.0
09/12/2015 10 Acceptable 0.0 0.3 1.3 0.0 1.6
08/13/2015 <10 Acceptable 0.0 0.0 1.0 0.0 1.0
07/09/2015 <10 Acceptable 0.3 0.3 0.1 0.0 0.7
06/12/2015 <10 Acceptable 0.0 0.0 0.0 0.2 0.2
05/13/2015 10 Acceptable 0.0 0.0 0.0 0.0 0.0
10/14/2014 <10 Acceptable 0.0 0.0 0.0 0.4 0.4
09/08/2014 <10 Acceptable 0.0 0.0 0.0 0.0 0.0
08/12/2014 <10 Acceptable 0.0 0.0 0.0 0.0 0.0
07/08/2014 10 Acceptable 0.2 0.0 0.0 0.0 0.2
06/13/2014 2098 Beach Advisory 1.4 0.0 0.1 0.0 1.5
05/13/2014 10 Acceptable 0.0 0.0 0.1 0.3 0.4
10/17/2013 20 Acceptable 0.0 0.0 0.0 0.0 0.0
09/19/2013 <10 Acceptable 0.0 0.0 0.0 0.0 0.0
08/15/2013 10 Acceptable 0.0 0.0 0.7 0.4 1.1
07/18/2013 <10 Acceptable 0.0 0.0 0.0 0.0 0.0
06/20/2013 63 Beach Advisory 0.0 0.0 0.3 0.2 0.5
05/30/2013 10 Acceptable 0.0 0.0 0.4 0.0 0.4
10/11/2012 <10 Acceptable 0.0 0.1 0.0 0.0 0.1
09/11/2012 20 Acceptable 0.0 0.0 0.0 1.4 1.4
08/14/2012 98 Beach Advisory 0.0 0.0 0.0 0.0 0.0
07/17/2012 10 Acceptable 0.0 0.0 0.2 0.0 0.2
06/12/2012 20 Acceptable 0.5 0.0 0.0 0.0 0.5
05/16/2012 10 Acceptable 0.1 0.4 0.1 0.0 0.6
10/20/2011 393 Beach Advisory 0.0 0.1 0.0 0.0 0.1
09/15/2011 578 Beach Advisory 0.0 0.0 0.0 0.0 0.0
08/17/2011 10 Acceptable 0.0 0.0 0.0 3.4 3.4
07/18/2011 <10 Acceptable 0.0 0.0 0.0 0.0 0.0
06/28/2011 31 Acceptable 0.0 0.0 0.0 0.0 0.0
05/17/2011 958 Beach Advisory 1.2 0.0 0.8 0.0 2.0
10/13/2010 10 Acceptable 0.0 0.1 0.3 0.0 0.4
09/12/2010 10 Acceptable 0.0 0.0 0.0 0.0 0.0
08/18/2010 <10 Acceptable 0.0 0.0 0.2 0.3 0.5
07/22/2010 275 Beach Advisory 0.0 0.1 0.0 1.4 1.5
06/16/2010 10 Acceptable 0.0 0.0 0.0 0.0 0.0
05/22/2010 <10 Acceptable 0.0 0.0 0.0 0.0 0.0
10/20/2009 10 Acceptable 0.0 0.0 0.0 0.0 0.0
09/15/2009 <10 Acceptable 0.0 0.0 0.0 0.0 0.0
08/21/2009 <10 Acceptable 0.0 0.0 0.0 0.0 0.0
07/29/2009 10 Acceptable 0.6 0.0 0.0 0.2 0.8
06/23/2009 75 Beach Advisory 0.0 0.0 0.6 0.5 1.1
06/08/2009 10 Acceptable 0.0 0.0 0.0 0.8 0.8
05/13/2009 5 Acceptable 0.0 0.0 0.0 0.0 0.0
10/21/2008 10 Acceptable 0.0 0.0 0.0 0.0 0.0
09/23/2008 <10 Acceptable 0.0 0.0 0.0 0.0 0.0
08/21/2008 <10 Acceptable 0.0 0.0 0.0 0.0 0.0
07/15/2008 20 Acceptable 0.0 1.1 0.0 0.0 1.1
06/25/2008 18 Acceptable 0.0 0.0 0.0 0.1 0.1
06/16/2008 365 Beach Advisory 0.0 0.0 1.7 0.0 1.7
05/20/2008 11 Acceptable 0.3 0.0 0.2 0.1 0.6

Entero Count (fecal indicator) and Rainfall Correlation

96 Samples taken

All Water Quality Parameters

96 Samples taken

Sample Date [i] Entero Count
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Entero Count

Enterococcus (“Entero”) is a fecal indicating bacterium that lives in the intestines of humans and other warm-blooded animals. It is the EPA preferred indicator for sewage contamination.

Quality [i] Temp (f)
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Temperature

Hudson River water temperature changes seasonally. Surface water temperature can change on small scales in the river reflecting natural and human influences.

[i] Salinity
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Salinity

Estuaries like the Hudson are where freshwaters in rivers meet the sea. Salinity tells us about the relative contribution of fresh and salt water within a particular region of the estuary. 

[i] Chlorophyll
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Chlorophyll

A measure of the amount of microscopic algae present in the water. High chlorophyll counts can mean high levels of the nutrients phosphorus and nitrogen, and the threat, or presence, of algae blooms.

[i] Turbidity
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Turbidity

Turbidity is a measure of the amount of fine particles suspended in the water. As turbidity rises, light penetration, a key factor for aquatic plants and algae, diminishes.

[i] Oxygen
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Oxygen

Oxygen concentrations in the water are closely connected to biological activities. Surface waters are typically in equilibrium with the atmosphere such that the oxygen concentration near the surface is close to fully saturated (100%).

Sort Sort Sort Sort Sort Sort Sort Sort
08/22/2023 109 Beach Advisory 24.33 0.52 6.1 1.9 93
07/18/2023 20 Acceptable 27.39 0.13 2.59 11.9 89.4
06/27/2023 2489 Beach Advisory 71.2 3.4 14.7 21.9 76.0
05/02/2023 216 Beach Advisory 52.6 0.2 3.5 7.8 97.4
10/11/2022 <10 Acceptable 65.4 4.8 1.8 7.4 86.6
09/11/2022 10 Acceptable 77.4 4.5 4.6 10.2 76.7
08/20/2022 <10 Acceptable 80.9 5.2 4.4 10 91.7
07/16/2022 <10 Acceptable 78.2 3.9 3 9.7 87.3
06/14/2022 <10 Acceptable 70.9 1.8 1.8 18.5 113.1
05/24/2022 75 Beach Advisory 63.2 1.6 2.5 29.3 90.9
10/29/2021 512 Beach Advisory 60.0 0.1 2.6 10 88
09/14/2021 <10 Acceptable 74.6 0.1 4.2 14 85
08/17/2021 20 Acceptable 77.5 1.8 13.3 18 84
07/20/2021 368 Beach Advisory 77.8 0.2 6.9 18 84
06/08/2021 <10 Acceptable 70.0 1.3 3.0 15 95
05/18/2021 63 Beach Advisory 61.9 0.2 2.5 18 94
10/15/2020 594 Beach Advisory 66.3 6.7 3.0 9 92
09/19/2020 246 Beach Advisory 73.5 6.4 2.4 10 87
08/15/2020 31 Acceptable 82.7 3.2 33.8 13 125
07/15/2020 10 Acceptable 82.0 4.2 5.2 10 97
06/17/2020 195 Beach Advisory 74.2 3.5 9.6 8 120
05/27/2020 <10 Acceptable 62.9 1.6 2.0 11 99
10/09/2019 74 Beach Advisory 66.6 3.8 6.3 8 87
09/11/2019 <10 Acceptable 78.1 3.9 19.2 8 120
08/07/2019 <10 Acceptable 84.4 4.0 4.8 9 81
07/10/2019 <10 Acceptable 80.0 1.4 11.1 15 113
06/06/2019 10 Acceptable 70.4 0.6 1.9 12 99
05/09/2019 20 Acceptable 58.0 0.1 2.4 15 99
10/11/2018 20 Acceptable 69.9 0.1 3.7 15 87
09/11/2018 41 Acceptable 78.1 1.4 3.2 9 77
08/15/2018 <10 Acceptable 84.3 0.2 2.7 17 86
07/18/2018 10 Acceptable 82.3 3.9 6.4 18 92
06/14/2018 <10 Acceptable 72.6 3.4 12.5 15 112
05/07/2018 31 Acceptable 59.4 0.2 2.0 15 100
10/17/2017 20 Acceptable 64.7 4.5 5.8 11 98
09/12/2017 <10 Acceptable 74.8 4.2 2.4 8 89
08/15/2017 20 Acceptable 79.3 2.4 10.5 12 95
07/11/2017 <10 Acceptable 81.3 0.8 2.7 11 96
06/13/2017 <10 Acceptable 76.9 0.1 3.5 9 130
05/16/2017 10 Acceptable 60.6 0.1 2.0 21 100
10/16/2016 <10 Acceptable 66.9 6.8 2.5 36 89
09/15/2016 134 Beach Advisory 77.7 6.4 12.1 n/a 112
08/16/2016 20 Acceptable 84.5 3.5 17.0 32 118
07/14/2016 20 Acceptable 79.8 3.1 34.0 15 104
06/16/2016 52 Acceptable 72.6 2.0 8.7 22 95
05/21/2016 10 Acceptable 60.5 0.5 3.6 32 100
10/13/2015 20 Acceptable 68.0 4.4 4.0 14 90
09/12/2015 10 Acceptable 81.0 4.7 3.5 16 82
08/13/2015 <10 Acceptable 81.3 3.6 8.6 14 104
07/09/2015 <10 Acceptable 76.9 0.2 3.3 28 87
06/12/2015 <10 Acceptable 70.8 0.6 3.7 14 94
05/13/2015 10 Acceptable 61.1 1.4 3.0 27 n/a
10/14/2014 <10 Acceptable 69.4 4.2 1.5 14 91
09/08/2014 <10 Acceptable 78.3 1.8 7.9 30 111
08/12/2014 <10 Acceptable 79.3 2.6 4.6 21 83
07/08/2014 10 Acceptable 82.5 0.4 10.1 26 109
06/13/2014 2098 Beach Advisory 71.2 2.5 4.5 17 91
05/13/2014 10 Acceptable 63.2 0.8 2.2 21 100
10/17/2013 20 Acceptable 69.9 4.4 2.3 12 90
09/19/2013 <10 Acceptable 74.6 1.7 3.7 16 98
08/15/2013 10 Acceptable 79.4 1.0 3.4 54 91
07/18/2013 <10 Acceptable 82.6 1.7 3.5 37 80
06/20/2013 63 Beach Advisory 72.7 0.1 2.3 21 107
05/30/2013 10 Acceptable 69.8 0.1 2.2 60 99
10/11/2012 <10 Acceptable 64.2 2.2 5.2 17 102
09/11/2012 20 Acceptable 76.4 3.2 10.2 47 107
08/14/2012 98 Beach Advisory 79.5 3.4 16.5 19 133
07/17/2012 10 Acceptable 84.8 4.7 20.5 15 150
06/12/2012 20 Acceptable 72.2 0.2 4.5 26 89
05/16/2012 10 Acceptable 64.9 0.1 6.2 45 107
10/20/2011 393 Beach Advisory 61.2 0.1 1.7 62 89
09/15/2011 578 Beach Advisory 67.8 0.1 2.0 56 91
08/17/2011 10 Acceptable 83.5 1.7 2.1 39 93
07/18/2011 <10 Acceptable 83.3 0.3 5.6 21 138
06/28/2011 31 Acceptable 78.0 0.6 7.8 6 100
05/17/2011 958 Beach Advisory 60.1 0.1 n/a n/a 96
10/13/2010 10 Acceptable 65.8 0.1 4.3 27 86
09/12/2010 10 Acceptable 74.8 2.9 9.2 11 86
08/18/2010 <10 Acceptable 81.8 3.8 7.5 9 89
07/22/2010 275 Beach Advisory 82.6 3.2 7.4 21 122
06/16/2010 10 Acceptable 72.0 2.2 3.5 20 84
05/22/2010 <10 Acceptable 65.2 1.9 2.4 22 94
10/20/2009 10 Acceptable 60.7 1.9 2.9 18 93
09/15/2009 <10 Acceptable 78.3 3.0 2.9 44 96
08/21/2009 <10 Acceptable 82.6 1.0 3.7 18 89
07/29/2009 10 Acceptable 78.2 0.3 6.8 19 86
06/23/2009 75 Beach Advisory 71.1 0.1 1.3 18 103
06/08/2009 10 Acceptable n/a n/a n/a n/a n/a
05/13/2009 5 Acceptable 65.2 0.2 3.3 17 120
10/21/2008 10 Acceptable 64.5 4.3 1.7 9 86
09/23/2008 <10 Acceptable 75.1 2.5 1.5 11 89
08/21/2008 <10 Acceptable 79.9 1.4 1.8 12 83
07/15/2008 20 Acceptable 82.4 2.4 8.9 22 140
06/25/2008 18 Acceptable 77.2 2.8 1.5 14 89
06/16/2008 365 Beach Advisory n/a n/a n/a n/a n/a
05/20/2008 11 Acceptable 58.0 0.6 2.1 31 94

Water Quality*

Acceptable (0–60) Beach Advisory (61+)

*Single sample thresholds;
Enterococcus count per 100mL

Prior Four Day Rainfall
(in inches)

Dry Weather (0–0.25) Wet Weather (0.25+)

Enterococcus is an EPA-approved fecal contamination indicator.

Samples taken by Riverkeeper, Lamont-Doherty Earth Observatory and CUNY Queens College staff, and processed on the Riverkeeper vessel, according to the 2014 Quality Assurance Project Plan.

Rainfall data comes from wunderground.com. Wet weather is a common trigger of fecal contamination.

What do the Numbers Mean?

Water Quality scoring is based on the 2012 Recreational Water Quality Criteria from the US Environmental Protection Agency (EPA) for safe swimming. Learn More

About this location:

Peekskill, NY
Annesville Creek is a tributary near Peekskill that is popular with kayakers.

Agencies Responsible:

Westchester County Dept. of Health: 914-813-5000 and NYSDEC Region 3: 914-428-2505

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